In the ingredient descriptions: Good means that I like to see this in a product's list of ingredients. Okay means this product appears safe for a curly person like me to use. Caution means that this ingredient may not be good in some hair care products, or for some people. Avoid means this ingredient may hurt your hair. If you see this ingredient in a hair product, it's best to put it down and walk away.

Sulfonated Oil(aka Sulfated oils)Avoid
Strips hair color and can damage hair [Begoun (Hair) pg 322]. This is a Sulfonated oil, which is made by reacting oils with sulfuric acid. This is known to strip color from both natural and colored hair, so it's often used to remove dye from the hair (Sulfonated Castor Oil is used for this) or to lighten it for highlights. May even dry out the skin if used on it. Sulfonated oils are used to keep the product from separating, and to help wet the hair faster. Therefore, they are often found in soapless shampoos, hair sprays [Winter (7th ed.) pgs 502, 512].
See also:Sulfonated Castor OilSource(s): BegounWinter